Ventilating system



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J. R. MCCOLL VENTILATING SYSTEM Filed May 27. 1922 2 Sheets-Sheet 2 wwwWw ....HHHU limi Hm Patented Jan. 13, 1925.

UNITED STATES vrarrsrrr .TAY n. Macon., or DETROIT, MICHIGAN.

VENTILATING SYSTEM.

Application med may 27, 1922. serial No. 564,067.

To all lwhom it may concern.'

Be it known that I, JAY R. MCCOLL, a citizen of the United States, andresiding at Detroit, in the county of Wayne and State 'of Michigan, haveinvented a new and Improved Ventilating System, of which the followingis a specification.

This invention relates to means for supplying fresh air to school rooms,churches and similar places of assembly where many persons congregate,and its object is to provide a Ventilating system by means of which theair can be discharged from a series of suitable openings in the ceilingsof such rooms and p so directed by proper diffusers that every portionof such rooms willireceive an adequate amount. A further object of thisinvention is a system of this character which shall be built into theceiling and walls of the room in which it is installed.-

This invention consists in a Ventilating system for assembly rooms inwhich a concrete slab is provided with an air conduit having a number ofdischarge openings in its lower side, and a diffuser mounted in theconduit adjacent each opening and provided with vanes for lcausing theair issuing from the opening to spread out to substantially pyramidalform.

It also consists in adjustable deiiectors at- Y tached to the severalditfusers to control the volume of air passing through-each diifuser.

It further consists of the details of construction illustrated in Vtheaccompanying drawings and particularly pointed out in the claims.

In the accompanying drawings, Fig. 1 is a vertical section of the walls,ceiling and i'loor of a room of a building provided with my improvedsystem of ventilation. Fig. 2 is a bottom plan of a ceiling. Fig. 3 is acentral longitudinal section of a portion of a ceiling air-conduit. Fig.4 is a section on the line 4-4 of Fig. 3. Fig. 5 isa detail of theconstruction of a ceiling conduit. Fig. 6 is a cross section of amodified form of conduit between diifusers. Fig. 7 is a bottom plan ofthe frame at a diiuser opening.

Similar reference characters refer to like p partslthroughout theseveral views.

inforced concrete which is molded over and between parallel rows ofterra-cotta tiles or sheet metal forms. the latter being used inincreasing proportions.

As a rule, these shectmetal forms are usually corrugated at both topsand sides so that they are unacceptable as air conduits owing to theexcessive resistance of the corrugated-surfaces to the flow of air. Itherefore provide the conduits shown in the drawings, consisting of tops1 and sides 2 which are preferably at the same angles to the top as thesides of the floor forms 3. The concrete 4 is molded over the tops andalong the sides of these air conduits to constitutey the floors of thebuildings, reinforcing bars of steel of any desired construction beingemployed. As the tops 1 of these conduits are fiat, posts or braces 6 ofHat bar steel are positioned as closely as necessary between the normalbottom,plate 7 of the conduit and the reinforcing angle 8 extendingalong the top thereof. The open The number of these air conduits in aceiling and therefore the distance between them will depend upon thesize of the room to be ventilated and the height of the ceiling, moreconduits being required in a low room than in one with high ceilings,the latter permitting higher air pressures. At intervals along theconduits the ceiling and the bottom plates 7 of the conduits are formedwith openings, bordered with the flat bars 12 and 13. If desi-red, agrate or screen 14 may be held in position by these flat bars. Or thesebars 12 and 13 may be formed parts of the register.

The lower edges of the sides 2 of these air conduits, along and at eachside of these openings, are turned in to constitute the flanges 15, thendown to constitute the borders 16 and then ont to constitute the flanges17, extending around three sides ofthe wood strips 18 which are ada tedto receive the screws 19 by which the ars 12 and 13 are secured. Iprefer to reinforce these portions y'of the conduit walls by angle'bars20, at-

tached to these bent portions of the walls andthe strips 1.8 by bolts22. These angle bars are preferably longer than the openings, asindicated in Fig. 7.

The bottom plates 7 of the air conduits are preferably offset downwardjust as these air openings, as shown atV 23, and tit the cross strips 24of wood, as shown in Fig. 3.

A diiluser, such as shown in Figs. 3 and 4, is mounted within the airconduit at each ceiling opening. It comprises a pla-te 26 turned down at27 and then outward to con stitute the flange 28 (Fig. 3). One edge isformed into hooks 29 to extend through slots 30 in one edge of adelector 31 at the inlet of each diffuser. The side plates 32 of eachdiffuser extend from the plate 26j- 27 and I prefer to stiften the loweredges of these side plates by means of the angle bars 34, which normallyrest on thebars 12. An angle bar 35 extends between the lower corners ofthe side plates 32 adjacent the strip 24 and rests on a bar 13.

Gaskets 37 of felt or other desirablematerial may be placed'between theedges 17 of the side walls 2 of the conduits and the angle bars 34 andbetween the edges 23 of the bottom plates of the conduit andthe [lange28 on the plate 26--27 of the diffuser and the angle bar 35respectively.

Attached to vthe angle bar 35 is a brace 38 which carries an adjustingscrew which eX- tends through a nut 4l, pivoted to the bracket 40 (Fig.4) on the deflector 31. As indicated in Fig. 1, these deiectors areplaced at such angles that substantially the desired amountsv of airwill pass down through the severa] diifusers.

I prefer to form the diffusera with dividing plates 42 which cause theair to issue at wider angles longitudinally of the conduits and with theHaring vanes 43 which cause the air to issue at wider anglestransversely to the conduits. These dividing plates and vanes cause avery uniform flow ofai-r in all parts of the pyramids of air descendingfrom these diliusers, that is, instead of a pyramid of air of which themiddle portion moves down much more swiftly than the outer protions, apyramid is produced wherein the flow of the-several portions is morenearly equal. The person sitting directly beneath a`diiuserwilltherefore receivebut little more fresh air than the person sittingbeneath a point midway betweentwo diifusers.

The air conduits in the floors may connect to main air conduits -ortunnels 45 in any desired manner, the vertical lues or ducts 46 beingindicated, these being formed in a side or partition wall 47. It willbeunderj stood, however, that any`other desired type of air supply maybe employed` This air may be heated or cooled if desired;

The details of construction andthe pro-y portions of parts may allbefcha'ngedby those skilled in the art without `departing from thespirit ot' my inventiony as set-forth in the following claims'.

Iclaim: l j r 1. In a veintillating system for rooms, a ceilingvconstruction,embodying an airgconduit having openings inits lowerside,a

diffuser mounted in the lower part of the conduit at each opening and,comprising sides, a top and an upright end, a lpartition plateextending vbetween the sides substantially parallel to the top and end,vanes extending longitudinally of and substantially within the conduitin each direction4 from that 'portion ofl the partitionplate which isparallel tothe endV cf the diffuser, and an adjustable gate mountedwithin the conduit adjacent each of thodiusers to determine theproportion of the air lpassing through the conduit which Vshall ypassthrough the adjacent diiiuser.

2. In a Ventilating system forrooms7 a ceiling construction embodying anlair confluit having openings. in lits lower side, a diffuser mounted inthe lower part yof the conduit at each opening and 'comprising sides, atop and' an uprightl end, vanes extending longitudinally of andsubstantially within the conduit, and ran adjustable gate mounted withinthe conduit adjacent. each of the dilusers to determinetheproportion ofthe air passing vthroughythe conduit which shall pass throughitheadjacent diffuser. .i

's JAY n. 'MCcoLn

